Metallurgy

A. Decrease flow
B. Continuous expansion
C. Relaxation of the internal stresses
D. Water loss

A. 19%
B. 2%
C. 1.7%
D. 4%

A. Remove the oxides formed on the gold alloy
B. Lower the melting point
C. Replace casting wax
D. Speed the burnout process

A. High quality iron
B. Chrome
C. Cobalt
D. Nickel

A. Ease of construction of denture
B. Preserving the sulci
C. Ease of pouring an impression
D. All of the above

A. ¼ inch
B. ½ inch
C. 3/8 inch
D. one inch

A. Decrease its strength and ability to be hardened
B. Decrease its tarnish resistance
C. Increase its fusion temperature
D. Redden the alloy

A. They have a modulus of elasticity twice that of gold alloys
B. They are more rigid than gold alloys
C. They have higher ductility than gold alloys
D. They have a lower proportional limit than gold alloys